咨询与建议

限定检索结果

文献类型

  • 1,767 篇 期刊文献
  • 514 篇 会议
  • 42 册 图书
  • 5 篇 学位论文
  • 2 件 标准

馆藏范围

  • 2,330 篇 电子文献
  • 0 种 纸本馆藏

日期分布

学科分类号

  • 1,771 篇 理学
    • 1,668 篇 物理学
    • 67 篇 生物学
    • 50 篇 化学
    • 26 篇 地球物理学
    • 18 篇 天文学
    • 10 篇 数学
  • 1,649 篇 工学
    • 949 篇 光学工程
    • 267 篇 仪器科学与技术
    • 226 篇 电气工程
    • 128 篇 生物医学工程(可授...
    • 103 篇 控制科学与工程
    • 78 篇 材料科学与工程(可...
    • 77 篇 计算机科学与技术...
    • 76 篇 电子科学与技术(可...
    • 74 篇 测绘科学与技术
    • 57 篇 核科学与技术
    • 53 篇 机械工程
    • 41 篇 航空宇航科学与技...
    • 35 篇 信息与通信工程
    • 29 篇 环境科学与工程(可...
    • 13 篇 软件工程
    • 11 篇 船舶与海洋工程
    • 10 篇 力学(可授工学、理...
  • 585 篇 医学
    • 345 篇 临床医学
    • 256 篇 特种医学
    • 185 篇 基础医学(可授医学...
    • 29 篇 医学技术(可授医学...
    • 28 篇 中西医结合
  • 32 篇 管理学
    • 30 篇 管理科学与工程(可...
  • 19 篇 教育学
    • 19 篇 心理学(可授教育学...
  • 18 篇 农学
  • 9 篇 艺术学
  • 4 篇 文学
  • 1 篇 法学
  • 1 篇 历史学

主题

  • 2,330 篇 modulation trans...
  • 355 篇 spatial frequenc...
  • 312 篇 image quality
  • 186 篇 point spread fun...
  • 139 篇 optical systems
  • 135 篇 spatial resoluti...
  • 126 篇 imaging systems
  • 106 篇 fourier transfor...
  • 103 篇 image processing
  • 73 篇 detective quantu...
  • 66 篇 noise power spec...
  • 61 篇 visual system
  • 59 篇 resolution
  • 58 篇 refractive index
  • 55 篇 mtf
  • 51 篇 optical design
  • 51 篇 atmospheric turb...
  • 45 篇 optical transfer...
  • 42 篇 nasa technical r...
  • 42 篇 (ntrs)

机构

  • 20 篇 univ chinese aca...
  • 17 篇 chinese acad sci...
  • 10 篇 ben gurion univ ...
  • 8 篇 chinese acad sci...
  • 8 篇 nanjing univ sci...
  • 7 篇 brookhaven natl ...
  • 7 篇 natl cheng kung ...
  • 7 篇 tianjin key lab ...
  • 6 篇 univ granada fac...
  • 6 篇 univ arizona col...
  • 6 篇 ludong univ sch ...
  • 6 篇 univ oklahoma sc...
  • 6 篇 tianjin univ sch...
  • 6 篇 univ oklahoma ct...
  • 5 篇 si vavilov state...
  • 5 篇 huazhong univ sc...
  • 5 篇 univ arizona ctr...
  • 5 篇 univ rochester i...
  • 5 篇 harbin inst tech...
  • 5 篇 ben-gurion univ....

作者

  • 17 篇 kopeika ns
  • 13 篇 yashchuk valeriy...
  • 11 篇 boreman gd
  • 11 篇 samei e
  • 10 篇 mckinney wayne r...
  • 9 篇 takacs peter z.
  • 9 篇 unoki masashi
  • 9 篇 leith en
  • 8 篇 wang fan
  • 8 篇 masaoka kenichir...
  • 8 篇 gao feng
  • 7 篇 zhao huijuan
  • 7 篇 bellotti enrico
  • 7 篇 lin psang dain
  • 7 篇 primot j
  • 7 篇 anderson erik h.
  • 7 篇 barber samuel k.
  • 7 篇 liu jian
  • 7 篇 wang honggang
  • 6 篇 akagi masato

语言

  • 1,736 篇 英文
  • 571 篇 其他
  • 20 篇 中文
  • 2 篇 法文
  • 1 篇 德文
  • 1 篇 俄文
检索条件"主题词=Modulation Transfer Function"
2330 条 记 录,以下是51-60 订阅
排序:
LCD-based method for evaluating modulation transfer function of optical lenses with poorly corrected distortion
收藏 引用
OPTICAL ENGINEERING 2021年 第6期60卷 063102-063102页
作者: He, Ping'an An, Xinlan Li, Xin Wuhan Univ Elect Informat Sch Wuhan Peoples R China
modulation transfer function (MTF) evaluation in the imaging of the optical lenses with poorly corrected geometric distortion involves sampling region of interest (ROI) images that are affected by geometric distortion... 详细信息
来源: 评论
modulation transfer function Characterization for GOES-16 Advanced Baseline Imager Using Lunar Observations  24
Modulation Transfer Function Characterization for GOES-16 Ad...
收藏 引用
Conference on Earth Observing Systems XXIV
作者: Wilson, Truman Xiong, Xiaoxiong Sci Syst & Applicat Inc 10210 Greenbelt Rd Lanham MD 20706 USA NASA GSFC Sci & Explorat Directorate Greenbelt MD 20771 USA
GOES-16 is a geostationary satellite with a number of Earth- and Sun-observing instruments. Among these, the primary Earth-imaging instrument is the Advanced Baseline Imager (ABI), which contains 16 spectral bands tha... 详细信息
来源: 评论
Investigation of patch-based modulation transfer function (MTF) prediction framework in radiography
收藏 引用
RADIATION PHYSICS AND CHEMISTRY 2021年 189卷 109728-109728页
作者: Kim, Kyu Bom Jeong, Seong Ho Lee, Su Hwan Kim, Kyuseok Yonsei Univ Dept Integrat Med Digital Healthcare Coll Med Seoul South Korea Yonsei Univ Severance Hosp Div Pulm & Crit Care Med Dept Internal MedColl Med Seoul South Korea
The modulation transfer function (MTF) is a well-established in imaging systems and has played a significant role in assessing the performance of information transfer in accordance with the spatial frequency. Exist me... 详细信息
来源: 评论
Implementation, validation and application of a tool for the assessment of the modulation transfer function and noise power spectrum of dental CBCT scanners
Implementation, validation and application of a tool for the...
收藏 引用
Conference on Medical Imaging - Physics of Medical Imaging
作者: Merken, K. Zhang, G. Shaheen, E. Jacobs, R. Politis, C. Bosmans, H. Katholieke Univ Leuven Div Med Phys & Qual Assessment Dept Imaging & Pathol Leuven Belgium UZ Leuven Dept Radiol Leuven Belgium
Purpose: The aim of this study was to implement, validate and apply a tool for the assessment of the MTF and NPS of dental cone-beam CT (CBCT) scanners using up-to-date measurement methods tested earlier for multi-sli... 详细信息
来源: 评论
Characterization of anti-scatter grids via a modulation transfer function improvement factor using an edge device
收藏 引用
BIOMEDICAL PHYSICS & ENGINEERING EXPRESS 2021年 第4期7卷 045001-045001页
作者: Maruyama, Sho Saito, Hiroki Shimosegawa, Masayuki Gunma Paz Univ Sch Radiol Sci Fac Hlth Sci Gunma Japan Gunma Prefectural Coll Hlth Sci Grad Sch Radiol Technol Gunma Japan
In optimizing the imaging conditions, changes in image quality due to scattered radiation are important evaluation targets. This study focuses on the evaluation of the image quality improvement characteristics obtaine... 详细信息
来源: 评论
Practical edge-based modulation transfer function measurement
收藏 引用
OPTICS EXPRESS 2019年 第2期27卷 1345-1352页
作者: Masaoka, Kenichiro NHK Sci & Technol Res Labs Setagaya Ku 1-10-11 Kinuta Tokyo 1578510 Japan
The accuracy and precision of the modulation transfer function (MTF) of a sampled imaging system are affected by the shift-variant nature of subpixel binning of the pixel values in edge-based methods. This study demon... 详细信息
来源: 评论
Experimental demonstration of wave-front coded imaging with a very low response of the modulation transfer function at the Nyquist frequency
收藏 引用
APPLIED OPTICS 2019年 第35期58卷 9562-9569页
作者: Zhao, Hui Mi, Jiao Yu, Congcong Ge, Rui Fan, Xuewu Chinese Acad Sci Xian Inst Opt & Precis Mech Space Opt Lab Xian 710019 Shaanxi Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China
Wave-front coding (WFC) is a well-known technique that can be used to extend the depth of field (DOF) of incoherent imaging systems. The phase masks make the optical transfer function drop significantly, and digital r... 详细信息
来源: 评论
modulation transfer function of liquid crystal microlenses and microprisms using double dielectric layer
收藏 引用
APPLIED OPTICS 2018年 第1期57卷 18-24页
作者: Sova, Oleksandr Reshetnyak, Victor Galstian, Tigran Univ Laval Dept Phys Genie Phys & Dopt Ctr Opt Photon & Laser Pav Opt Photon 2375 Rue Terrasse Quebec City PQ G1V 0A6 Canada Taras Shevchenko Natl Univ Kyiv Phys Fac Volodymyrska St 64 UA-01601 Kiev Ukraine Lensvector Inc 6203 San Ignacio Ave Suite 110 San Jose CA 95119 USA
We investigate electrically tunable liquid crystal (LC) microlenses and microprisms based on double dielectric optically hidden (DDOH) layers. Comparative theoretical study of the spatial resolution limits in the crea... 详细信息
来源: 评论
Investigation of speckle imagery spectral estimation challenges for modulation transfer function measurements
收藏 引用
OPTICAL ENGINEERING 2019年 第7期58卷
作者: Plummer, Philip J. Barnard, Kenneth J. Marciniak, Michael A. US Air Force Res Lab Sensors Directorate EO IR Targeting & Surveillance Branch Wright Patterson AFB OH 45433 USA US Air Force Inst Technol Dept Engn Phys Wright Patterson AFB OH 45433 USA
Efforts to extend speckle-based focal plane array modulation transfer function measurements beyond the detector Nyquist frequency have unearthed challenging spectral estimation issues. In an attempt to better understa... 详细信息
来源: 评论
modulation transfer function of a fish-eye lens based on the sixth-order wave aberration theory
收藏 引用
APPLIED OPTICS 2018年 第2期57卷 314-321页
作者: Jia, Han Lu, Lijun Cao, Yiqing Shanghai Univ Dept Precis Mech Engn Shanghai 200072 Peoples R China
A calculation program of the modulation transfer function (MTF) of a fish-eye lens is developed with the autocorrelation method, in which the sixth-order wave aberration theory of ultra-wide-angle optical systems is u... 详细信息
来源: 评论